ABSTRACT
Diketopyrrolopyrrole (ACQ-gen) and tetraphenylethenes (AIE-gen) are linked together with phenyl bridges. The derivatives show substantially enhanced and red-shifted emission in the solid state.
Subject(s)
Pyrroles/chemistry , Stilbenes/chemistry , Fluorescent Dyes , Luminescence , Molecular Conformation , Oxidation-Reduction , Spectrometry, FluorescenceABSTRACT
A strategy towards efficient mechanochromic luminogens with high contrast is developed. The twisted propeller-like conformations and effective intermolecular interactions not only endow the luminogens with AIE characteristics and high efficiency in the crystalline state, but also render them to undergo conformational planarization and disruption in intermolecular interactions upon mechanical stimuli, resulting in remarkable changes in emission wavelength and efficiency.
Subject(s)
Luminescent Measurements/methods , Terphenyl Compounds/chemistry , Color , Materials Testing , Molecular Conformation , Stress, MechanicalABSTRACT
A pyridinyl-functionalized tetraphenylethene (Py-TPE) was synthesized and it demonstrated colorimetric and ratiometric fluorescent responses to trivalent metal cations (M(3+), M = Cr, Fe, Al) over a variety of mono- and divalent metal cations.
ABSTRACT
Perylene bisimide derivatives substituted with one and two tetraphenylethene moieties at 1 and 1,7-postions show distinct optical properties. The former displays characteristic emission features of perylene bisimides in solution and red emission in the aggregate state, while the latter is nonemissive in solution but highly red-emissive in the aggregate state.